Rock Jock
Johnny Joint 21-Up Bronco Rear Control Arm Set Adjustable Steel RockJock 4X4
SKU: R01U RJ-182400-101
Description
Part #: RJ-182400-101
RockJock's complete set of 4 Johnny Joint adjustable length control arms for 2021-up Broncos provides length adjustability on all 4 arms, allowing the pinion angle be adjusted after a lift is installed. Additionally, the adjustable feature of our arms allows your vehicle to be upgraded to different lift amounts without having to replace the control arms in the future.To allow complete unrestricted movement, RockJock's Johnny Joint rod ends used at both ends of all of the arms. Arms are 1.625 inch o.d. x .250 inch wall DOM steel tubing and feature 1 1/4 inch-12 RH/LH threaded adjuster ends, allowing pinion angle to be adjusted without either end of the arm having to be removed from the chassis!All arms are powder coated semi-gloss black, and are fitted zerk fittings for greasing.
Johnny Joint (R) Control Arm Set | Adjustable | Steel
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Rock Jock |
| Part Number | R01U RJ-182400-101 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy